Tautological bundle

The Majorana equation is a relativistic wave equation similar to the Dirac equation but includes the charge conjugate ψ_c of a spinor ψ. It is named after the Italian physicist Ettore Majorana, and it is

$-i{\partial \!\!\!{\big /}}\psi +m\psi _{c}=0\qquad \qquad (1)$

with the derivative operator ${\partial \!\!\!{\big /}}$ written in Feynman slash notation to include the gamma matrices as well as a summation over the spinor components. In this equation ψ_c is the charge conjugate of ψ, which can be defined in the Majorana basis as

$\psi _{c}:=i\psi ^{*}.\$

Equation (1) can alternatively be expressed as

$i{\partial \!\!\!{\big /}}\psi _{c}+m\psi =0\qquad \qquad (2)$.

In either case, the quantity Template:Mvar in the equation is called the Majorana mass.

The appearance of both ψ and ψ_c in the Majorana equation means that the field ψ cannot be coupled to an electromagnetic field without violating charge conservation, so ψ is taken to be neutrally charged. Nonetheless, the quanta of the Majorana equation given here are two particle species, a neutral particle and its neutral antiparticle. The Majorana equation is frequently supplemented by the condition that Buying, selling and renting HDB and personal residential properties in Singapore are simple and transparent transactions. Although you are not required to engage a real property salesperson (generally often known as a "public listed property developers In singapore agent") to complete these property transactions, chances are you'll think about partaking one if you are not accustomed to the processes concerned.

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Particles corresponding to Majorana spinors are aptly called Majorana particles. Such a particle is its own antiparticle. Thus far, of all the fermions included in the Standard Model, none is described as a Majorana fermion. However, there is the possibility that the neutrino is of a Majorana nature. If so, neutrinoless double-beta decay, as well as a range of lepton-number violating meson and charged lepton decays, are possible. A number of experiments probing if the neutrino is a Majorana particle are currently underway.

External links

• Majorana Legacy in Contemporary Physics
• Majorana returns